#pragma once

#include <iostream>
#include <sys/epoll.h>

class Epoll
{
    const static int gnum=128;
    const static int gtimeout=5000;
public:
    Epoll(int timeout = gtimeout)
    :_timeout(timeout)
    {
    }

    void CreateEpoll()
    {
        _epfd = epoll_create(gnum);
        if(_epfd < 0) exit(5);
    }

    bool DelFromEpoll(int sock)
    {
        int n = epoll_ctl(_epfd, EPOLL_CTL_DEL, sock, nullptr);
        return n==0;
    }

    bool CtrlEpoll(int sock, uint32_t events)
    {
        events |= EPOLLET;
        struct epoll_event ev;
        ev.events = events;
        ev.data.fd = sock;
        int n = epoll_ctl(_epfd, EPOLL_CTL_MOD, sock, &ev);
        return n==0;
    }

    bool AddSockToEpoll(int sock, uint32_t events)
    {
        struct epoll_event ev;
        ev.events = events;
        ev.data.fd=sock;
        int n = epoll_ctl(_epfd, EPOLL_CTL_ADD, sock, &ev);
        return n==0;
    }

    int WaitEpoll(struct epoll_event revs[], int num)
    {
        return epoll_wait(_epfd, revs, num, _timeout);
    }

    ~Epoll()
    {
    }

private: 
    int _epfd;
    int _timeout;
};